When Monitored and Set Condition:

When Monitored: With the engine running in closed loop mode, the ambient/battery temperature above 20°F (-7°C) and altitude below 8500 ft.

Set Condition: If the PCM multiplies short term compensation by long term adaptive and a purge fuel multiplier and the result is below a certain value for 30 seconds over trips, a freeze frame is stored, the MIL illuminates and a trouble code is stored.